A/2019 G2
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Perihelion	7 Dec 2019	20.6	2.298 AU	1.896 AU	11h00m	+33°49'	101.0°	24.9°	290°
Nearest approach	10 Jan 2020	19.7	2.330 AU	1.453 AU	08h21m	+54°59'	145.3°	13.9°	204°
Today	19 Apr 2024	27.9	13.049 AU	13.884 AU	00h12m	-10°08'	32.6°	2.4°	229°

The interactive orbit chart above shows the comet's path through the solar system and its position at the given date. Green and blue lines are shown perpendicular to the ecliptic plane: Green if the path is above the ecliptic plane, blue if it is below. (Left-click and drag to rotate the view; Right-click and drag to move the view; Use scroll wheel to zoom in our out.)

The orbital elements of A/2019 G2 are:

            e (Eccentricity)                : 0.9943670
            q (Perihelion distance)         : 2.2982510
            i (Inclination)                 : 159.22550
            Ω (Longitude of ascending node) : 208.18040
            ω (Argument of perihelion)      : 82.65400
            L (Longitude of perihelion)     : 126.03106
            B (Latitude of perihelion)      : 20.59620
            T (Time of perihelion passage)  : 2458825.03790
            P (Orbital period in years)     : 8241.13

            Epoch                           : 2024 Apr 19
            Reference                       : MPEC 2024-E01

            Classification(s):              : Nearly isotropic; Returning (a < 10000 AU); External (P > 200 years)
        

The light curve chart below shows the estimated development of the comet's magnitude. Blue and black dots are visual and photometric CCD observations respectively from COBS or the MPC. The gray curve indicates the expected brightness if this object is a comet (15.00 + 5 log[∆] + 10.00 log[r]), whereas the red curve indicates the expected lightcurve for an asteroid (H=16.30; G=.15).

The all-sky chart below shows the path of the comet over the same period as the light curve. The comet's current position is marked yellow.

The following chart shows the short-term path of the comet in a field of view that is optimized for (~10x50) binoculars and finderscopes.
A more printer-friendly version of the same chart can be found further down this page as well.

The following chart shows the current location of the comet in a smaller, upside-down telescopic field of view.

A printable version of the short-term path of the comet in a field of view that is optimized for (~10x50) binoculars and finderscopes.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2024-04-19 00:00 UT   00 12 40.5   -10 08 43    13.886   13.044   31.9    2.3   229   27.9 
2024-04-19 20:08 UT   00 12 50.6   -10 08 12    13.884   13.049   32.6    2.4   229   27.9 
2024-04-20 00:00 UT   00 12 52.5   -10 08 06    13.883   13.050   32.8    2.4   229   27.9 
2024-04-21 00:00 UT   00 13 04.4   -10 07 30    13.881   13.056   33.6    2.4   230   27.9 
2024-04-22 00:00 UT   00 13 16.2   -10 06 55    13.878   13.062   34.5    2.5   230   27.9 
2024-04-23 00:00 UT   00 13 27.8   -10 06 22    13.875   13.068   35.4    2.6   231   27.9 
2024-04-24 00:00 UT   00 13 39.3   -10 05 51    13.871   13.075   36.3    2.6   231   27.9 
2024-04-25 00:00 UT   00 13 50.7   -10 05 21    13.868   13.081   37.2    2.7   232   27.9 
2024-04-26 00:00 UT   00 14 01.9   -10 04 53    13.864   13.087   38.1    2.7   232   27.9 
2024-04-27 00:00 UT   00 14 13.1   -10 04 26    13.860   13.093   38.9    2.8   233   27.9 
2024-04-28 00:00 UT   00 14 24.0   -10 04 01    13.855   13.099   39.8    2.8   233   27.9 
2024-04-29 00:00 UT   00 14 34.9   -10 03 37    13.851   13.105   40.7    2.9   234   27.9 

    Terminology:
            
    delta:  distance between comet and earth in AU
    radius: distance between comet and sun in AU
    magn:   magnitude (brightness) estimate    
    ra:     right ascension in hours (24h = 360deg)
    dec:    declination in degrees
    elong:  elongation in degrees (angle sun-earth-comet)    
    phase:  phase angle in degrees (angle sun-comet-earth)        
    AU:     Astronomical Unit (mean distance between earth and sun: 149597870.7 km      
    

Orbital elements usually provided by the MPC (Minor Planet Center).
Observations contributed by observers worldwide, via COBS (Comet Observation Database) or the MPC (Minor Planet Center)
Calculations by a modified version of AAPlus, a C# implementation of the AA+ project by PJ Naughter from the algorithms presented in the book "Astronomical Algorithms" by Jean Meeus.
NGC2000 dso catalog and star labels from VizieR as provided by the Strasbourg astronomical Data Center.
Tycho2 catalog from the ESO archive.